Hmm, I guess I never thought of windmills as something that I'd want heavy weight on.

What is were you loading the Windmills with?

When I do them I typically throw them in as a warmup exercise using my 24KG bell sticking in the 3-5 rep range. 1-3 sets depending on how I feel that day.

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"And for crying out loud. Don't go into the pain cave. I can't stress this enough. Your Totem Animal won't be in there to help you. You'll be on your own. The Pain Cave is for cowards.
Pain is your companion, don't go hide from it."
-Kelly Starrett